diff --git a/include/ntapi/nt_thread.h b/include/ntapi/nt_thread.h
index 0c931b1..3f67129 100644
--- a/include/ntapi/nt_thread.h
+++ b/include/ntapi/nt_thread.h
@@ -74,7 +74,7 @@ typedef enum _nt_exception_disposition {
 
 
 /* thread context */
-#define NT_CONTEXT_JUST_EVERYTHING		(intptr_t)-1
+#define NT_CONTEXT_JUST_EVERYTHING		(uint32_t)-1
 
 /* source mark: arch-specific code: begin */
 #if (__SIZEOF_POINTER__ == 4)